stb_image: First-pass stbi__sse2_available for GCC

ago%!(EXTRA string=11 years) · c625d24197
parent aabf2c5c49
commit c625d24197
1 changed files with 12 additions and 0 deletions
--- a/stb_image.h
+++ b/stb_image.h
@ -419,6 +419,18 @@ static int stbi__sse2_available()

 #ifndef STBI_SIMD_ALIGN
 #define STBI_SIMD_ALIGN(type, name) type name
+
+static int stbi__sse2_available()
+{
+#if defined(__GNUC__) && (__GNUC__ * 100 + __GNUC_MINOR__) >= 408 // GCC 4.8 or later
+   // GCC 4.8+ has a nice way to do this
+   return __builtin_cpu_supports("sse2");
+#else
+   // portable way to do this, preferably without using GCC inline ASM?
+   // just bail for now.
+   return 0;
+#endif
+}
 #endif

 ///////////////////////////////////////////////